Home / 1,660.24-2,291.12-988.08

Finding the Fourth Proportional to 1,660.24, 2,291.12 and 988.08

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Solution

The fourth proportional to 1,660.24, 2,291.12 and 988.08 is: 1,363.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.24 : 2,291.12 = 988.08 : x
  2. Step 2: Convert to fraction form
    1,660.24/2,291.12 = 988.08/x
  3. Step 3: Cross multiply
    1,660.24x = 2,291.12 × 988.08
  4. Step 4: Simplify right side
    1,660.24x = 2,263,809.85
  5. Step 5: Solve for x
    x = 2,263,809.85/1,660.24
  6. Step 6: Final answer
    x = 1,363.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.